OK, suppose I'm sending my phone to warranty (I hope I won't, but just *if*). So if I use backupmenu, restore the phone to initial settings to not break warranty (e.g. uninstall kernel-power, etc), get my phone back, and restore using backupmenu, everything will be back as it was?

I guess yes, because if it backups the rootfs then the SSU, kernel, customized files, installed apps, everything will be back at it's place, but I need a confirmation just in case